As one might expect, a number of Internet sources have claimed to already know who it might be, with some taking advantage of the default landing page of the BBC's Doctor Who site to 'reveal' "Peter-Capaldi-is-the-Twelfth-Doctor" and the like - suffice it to say these are not legitimate links! Meanwhile, comic actor Chris O'Dowd continued to play to the rumours of his casting, tweeting: "Anyone know a good breakfast place in Cardiff? ... gonna be spending quite a bit of time here.". Supernatural's Misha Collins also continued his own 'campaign' when he followed up last night's comment with "Yesterday I said I had an announcement regarding the UK & phone booths. Well, the announcement is... (see photo)".
The person to play the Doctor is apparently ready and waiting (and well hidden) at Elstree, with photographer Rankin reporting that he'd taken the official photo for publicity tonight. Cloudbass Graphics reported on the studio itself: "Quiet in BBC Elstree Studio D gallery. Live graphics on Dr Who Live: The Next Doctor at 7 pm tonight on BBC1".
Meanwhile, outside the studios, the huge queue for tonight's programme has continued to grow, with fan Jacqui Connell tweeting "This is the scene outside as we wait to be let in!! Excitement mounting", with Kier Husband observing "a queue for Who at BBC Elstree" as it weaves around the street corner! Entertainment correspondent Lizo Mzimba was on hand to report on the event and some of the more colourful characters in the queue!
With the doors opening imminently, it won't be long until the next Doctor is unveiled ...
Update 6:30pm: photos from the studio, with thanks to Doctor Who Magazine on Twitter